Positive and negative ion beam merging system for neutral beam production

Leung, Ka-Ngo; Reijonen, Jani

Title: Positive and negative ion beam merging system for neutral beam production

Abstract

The positive and negative ion beam merging system extracts positive and negative ions of the same species and of the same energy from two separate ion sources. The positive and negative ions from both sources pass through a bending magnetic field region between the pole faces of an electromagnet. Since the positive and negative ions come from mirror image positions on opposite sides of a beam axis, and the positive and negative ions are identical, the trajectories will be symmetrical and the positive and negative ion beams will merge into a single neutral beam as they leave the pole face of the electromagnet. The ion sources are preferably multicusp plasma ion sources. The ion sources may include a multi-aperture extraction system for increasing ion current from the sources.

Inventors:: Leung, Ka-Ngo; Reijonen, Jani

Issue Date:: 2005-12-13

Research Org.:: Univ. of California, Oakland, CA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1175580

Patent Number(s):: 6974950

Application Number:: 10/232,503

Assignee:: The Regents of the University of California (Oakland, CA)

Patent Classifications (CPCs):: G - PHYSICS G21 - NUCLEAR PHYSICS G21K - TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS

Show more

G - PHYSICS G21 - NUCLEAR PHYSICS G21K - TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR
G21K1/093 - by magnetic means

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
H01J2237/31701 - Ion implantation
H01J37/08 - Ion sources

H - ELECTRICITY H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR H05H - PLASMA TECHNIQUE
H05H3/02 - Molecular or atomic beam generation {

Show less

DOE Contract Number:: AC03-76SF00098

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: 47 OTHER INSTRUMENTATION

Citation Formats


                    Leung, Ka-Ngo, and Reijonen, Jani. Positive and negative ion beam merging system for neutral beam production.  United States: N. p., 2005. 
        Web.

Copy to clipboard


                    Leung, Ka-Ngo, & Reijonen, Jani. Positive and negative ion beam merging system for neutral beam production.  United States.

Copy to clipboard


                    Leung, Ka-Ngo, and Reijonen, Jani. Tue .  
        "Positive and negative ion beam merging system for neutral beam production".  United States.  https://www.osti.gov/servlets/purl/1175580.

Copy to clipboard


                    
@article{osti_1175580,

  title        = {Positive and negative ion beam merging system for neutral beam production},

  author       = {Leung, Ka-Ngo and Reijonen, Jani},

  abstractNote = {The positive and negative ion beam merging system extracts positive and negative ions of the same species and of the same energy from two separate ion sources. The positive and negative ions from both sources pass through a bending magnetic field region between the pole faces of an electromagnet. Since the positive and negative ions come from mirror image positions on opposite sides of a beam axis, and the positive and negative ions are identical, the trajectories will be symmetrical and the positive and negative ion beams will merge into a single neutral beam as they leave the pole face of the electromagnet. The ion sources are preferably multicusp plasma ion sources. The ion sources may include a multi-aperture extraction system for increasing ion current from the sources.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2005},

  month        = {12}

}

Copy to clipboard

Patent:

Save / Share:

Export Metadata

Save to My Library

Works referenced in this record:

A neutron tube with constant output (1010 n/sec) for activation analysis and reactor applications
journal, March 1965

Bounden, J. E.; Lomer, P. D.; Wood, J. D. L. H.
Nuclear Instruments and Methods, Vol. 33, Issue 2
https://doi.org/10.1016/0029-554X(65)90055-8

Ion-Ion Mutual Neutralization Cross Sections Measured by a Superimposed Beam Technique
journal, January 1970

Aberth, William H.; Peterson, James R.
Physical Review A, Vol. 1, Issue 1
https://doi.org/10.1103/PhysRevA.1.158

Similar Records in DOE Patents and OSTI.GOV collections:

Production of intense negative hydrogen beams with polarized nuclei by selective neutralization of negative ions

Patent Hershcovitch, Ady [Mount Sinai, NY]

A process for selectively neutralizing H.sup.- ions in a magnetic field to produce an intense negative hydrogen ion beam with spin polarized protons. Characteristic features of the process include providing a multi-ampere beam of H.sup.- ions that are intersected by a beam of laser light. Photodetachment is effected in a uniform magnetic field that is provided around the beam of H.sup.- ions to spin polarize the H.sup.- ions and produce first and second populations or groups of ions, having their respective proton spin aligned either with the magnetic field or opposite to it. The intersecting beam of laser light ismore » « less
Full Text Available
Battery system including batteries that have a plurality of positive terminals and a plurality of negative terminals

Patent Dougherty, Thomas J; Symanski, James S; Kuempers, Joerg A; ...

A lithium battery for use in a vehicle includes a container, a plurality of positive terminals extending from a first end of the lithium battery, and a plurality of negative terminals extending from a second end of the lithium battery. The plurality of positive terminals are provided in a first configuration and the plurality of negative terminals are provided in a second configuration, the first configuration differing from the second configuration. A battery system for use in a vehicle may include a plurality of electrically connected lithium cells or batteries.
Full Text Available
Negative ion beam injection apparatus with magnetic shield and electron removal means

Patent Anderson, Oscar A [Berkeley, CA]; Chan, Chun F [Hayward, CA]; Leung, Ka-Ngo [Hercules, CA]

A negative ion source is constructed to produce H.sup.- ions without using Cesium. A high percentage of secondary electrons that typically accompany the extracted H.sup.- are trapped and eliminated from the beam by permanent magnets in the initial stage of acceleration. Penetration of the magnetic field from the permanent magnets into the ion source is minimized. This reduces the destructive effect the magnetic field could have on negative ion production and extraction from the source. A beam expansion section in the extractor results in a strongly converged final beam.
Full Text Available
Method and apparatus for efficient photodetachment and purification of negative ion beams

Patent Beene, James R [Oak Ridge, TN]; Liu, Yuan [Knoxville, TN]; Havener, Charles C [Knoxville, TN]

Methods and apparatus are described for efficient photodetachment and purification of negative ion beams. A method of purifying an ion beam includes: inputting the ion beam into a gas-filled multipole ion guide, the ion beam including a plurality of ions; increasing a laser-ion interaction time by collisional cooling the plurality of ions using the gas-filled multipole ion guide, the plurality of ions including at least one contaminant; and suppressing the at least one contaminant by selectively removing the at least one contaminant from the ion beam by electron photodetaching at least a portion of the at least one contaminant usingmore » a laser beam. « less
Full Text Available
Method and system for controlling the position of a beam of light

Patent Steinkraus, Jr., Robert F. (San Francisco, CA); Johnson, Gary W [Livermore, CA]; Ruggiero, Anthony J [Livermore, CA]

An method and system for laser beam tracking and pointing is based on a conventional position sensing detector (PSD) or quadrant cell but with the use of amplitude-modulated light. A combination of logarithmic automatic gain control, filtering, and synchronous detection offers high angular precision with exceptional dynamic range and sensitivity, while maintaining wide bandwidth. Use of modulated light enables the tracking of multiple beams simultaneously through the use of different modulation frequencies. It also makes the system resistant to interfering light sources such as ambient light. Beam pointing is accomplished by feeding back errors in the measured beam position tomore » « less
Full Text Available

Similar Records

Title: Positive and negative ion beam merging system for neutral beam production

Abstract

Citation Formats

A neutron tube with constant output (1010 n/sec) for activation analysis and reactor applications journal, March 1965

Ion-Ion Mutual Neutralization Cross Sections Measured by a Superimposed Beam Technique journal, January 1970

A neutron tube with constant output (1010 n/sec) for activation analysis and reactor applications
journal, March 1965

Ion-Ion Mutual Neutralization Cross Sections Measured by a Superimposed Beam Technique
journal, January 1970